6648644847 has 8 divisors (see below), whose sum is σ = 9546772144. Its totient is φ = 4091473728.

The previous prime is 6648644839. The next prime is 6648644851. The reversal of 6648644847 is 7484468466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6648644847 - 2³ = 6648644839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6648644857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85238998 + ... + 85239075.

It is an arithmetic number, because the mean of its divisors is an integer number (1193346518).

Almost surely, 2^6648644847 is an apocalyptic number.

6648644847 is a deficient number, since it is larger than the sum of its proper divisors (2898127297).

6648644847 is a wasteful number, since it uses less digits than its factorization.

6648644847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170478089.

The product of its digits is 24772608, while the sum is 57.

The square root of 6648644847 is about 81539.2227519983. Note that the first 3 decimals coincide. The cubic root of 6648644847 is about 1880.3746091251.

The spelling of 6648644847 in words is "six billion, six hundred forty-eight million, six hundred forty-four thousand, eight hundred forty-seven".